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Recent content by NeilDS

  1. NeilDS

    How to Determine The Effect of Oil Viscosity on Flow Rate?

    I was just doing some calculations using the Hagen–Poiseuille equation and wondering if that was the best method. I don't have much more detail. I do know the new engine flow requirment and pressure and have use that to calculate a d^4/L value and have used that to try and calculate flow with...
  2. NeilDS

    How to Determine The Effect of Oil Viscosity on Flow Rate?

    That is a significant amount for a relative small change in viscosity. What are you basing that on?
  3. NeilDS

    How to Determine The Effect of Oil Viscosity on Flow Rate?

    I am trying to determine the end of life oil flow requirements of an engine with the oil viscosity at minimum specification limit. I have the flow requirement data based on testing and calculations for end of life (all bearings at spec limit) for a nominal viscosity (14.7 cst) for 40w oil but am...
  4. NeilDS

    Moisture Requirement for Marine Diesel Turbo Intake

    I am working on a marine diesel application that is using MAN B&W turbochargers. MAN has some pretty strict requirements for the moisture of the intake air. They require 100% of drops > 13 microns and 98% of drops > 5 microns. I am guessing that they are try to keep out salts and contaminants...
  5. NeilDS

    Moisture Requirment for Turbo Intake

    I am working on a marine diesel application that is using MAN B&W turbochargers. MAN has some pretty strict requirements for the moisture of the intake air. They require 100% of drops > 13 microns and 98% of drops > 5 microns. I am guessing that they are try to keep out salts and contaminants...
  6. NeilDS

    Zinc in Diesel Fuel or JP-5

    On a project I am working on, a concern has been rasied about the effects of zinc in Diesel Fuel or JP-5 would have on the fuel system and engine wear of our Diesel Generators (1+ MW). Some of the fuel storage tanks also can funtion as water balast tanks and have zinc anodes installed in them...
  7. NeilDS

    Fuel Pressure Regulator

    For the systems I worked on at Siemens, they were just pressure relief type regulators that were put in an intank pump module. They were not part of the pump, still a seperate part. From what I remember they just returned back into the tank. Here is some info on the regulators...
  8. NeilDS

    Fuel Pressure Regulator

    I know that pulse width modulated pump have been in development for auto fuel systems, but as of a few years ago all the non return system I worked on just used in tank regulator modules. These regulators were the same ones that were put on the rails for the return systems, just moved back to...
  9. NeilDS

    Fuel Pressure Regulator

    Many of the automotive non return systems just use a return style regultor mounted in the fuel tank. This does reduce the the fuel heating and and ends up cheaper since only one line needs to be run up to the fuel rail. When they started swithching over to the non retrun systems the did find...
  10. NeilDS

    CuNi Piping with Carbon Steel Valves

    It is outside is in a ventilated space. The outside may see a little sea water on a rare occasion
  11. NeilDS

    CuNi Piping with Carbon Steel Valves

    I am working on an application where 70/30 CuNi piping has been specified for JP5 delivery. The end user of the JP5 has carbon steel valves and connections that the CuNi piping has to mate up to. Are there any corrosion problems with the mating of these dissimilar metals and JP5?
  12. NeilDS

    Clean Emissions = Higher Operating Temp ??

    It has also been reported that advancing the ignition timing will increase the NOx emission. This is against the belief that higher exhaust temperature will cause higher NOx emission. Any comment about this? I will take a SWAG at that. The increased exhaust temperature, when timing is retated...
  13. NeilDS

    Injector flowbench test fluid

    At Siemens we used Viscor from what I remember. http://www.rockvalleyoil.com/Calibration_Fluids.htm
  14. NeilDS

    Info about twostroke direct injection

    Synerject is the company doing the direct injection system for Mercury. http://www.synerject.com/di.html They started as a joint venture between Siemens and Orbital. Neil
  15. NeilDS

    Diesel Engine Fuel Dilution

    I was a fuel system engineer for Caterpillar and many of our fuel components used engine oil as hydraullic oil, like the HEUI injectors. Our system specification limit was 7% fuel dilution in the oil and we did all of our endurance testing with oil at that level or higher. I believe the engine...
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